IPA: /ˈprɛslaɪst/
KK: /ˈprɛslaɪst/
Cut into pieces before being sold or used.
The presliced bread is convenient for making sandwiches quickly.
Presliced → It is formed from "pre-" (meaning before) and "sliced" (from the verb "slice", which comes from Old French *eslicer*, meaning to cut). The word "presliced" means cut into slices beforehand.
Think of something that is 'cut' ('sliced') 'before' ('pre-') you use it — that's why presliced means it's already sliced for you.